E.B. and Kyla find out that the label "Nostra Culpa" means "our fault" in Latin. But what happened? To solve this mystery, E.B. meets with Arlene Chan, whose grandfather was affected by the Chinese Head Tax. Kyla speaks with the granddaughter of Harnam Singh who was on board the Komagata Maru, a ship turned away at the Vancouver port because of a racist anti-immigration law in 1914. Finally, E.B. visits the Mohawk Institute Residential School and meets Geronimo. He finds out the horrible life many Indigenous kids were forced to lead in these schools. In season two of The Mystery Files, Kyla and E.B. are ready to solve many more of history's mysteries!